Adjustable prop stand of window curtain

ABSTRACT

An adjusting structure of adjustable window curtain prop stand includes two prop plates and an adjusting structure arranged between the two prop plates. The adjusting structure further includes a lead screw, two displacing elements, two positioning elements and a plurality of connecting elements. The lead screw has two external threads respectively with different directions of spiral and available for being engaged with the two displacing elements thereon. The two positioning elements are respectively secured to inner side faces of the two prop plates to be located at an upper and a lower positions between the two displacing elements, where each connecting element is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention in general relates to a window curtain, in particular, to a prop stand that is used for hanging window curtain and for adjusting height position of the hanged window curtain.

2. Description of Prior Art

Accordingly, window is an architecture design for people looking into distance from the indoors to the outdoors. Since of the existence of a window, the outdoor view can be broadened more extensively and that is the reason why a French window is sometimes designed as a necessary decoration in the house. However, when the sunshine is stronger in the daytime, the design of window also easily creates the temperature increase in the house or making people in the house feel uncomfortable. Therefore, the window in the house is usually arranged window curtain to shade the sunshine.

In order to beautify the indoors, the selection or replacement of window curtain therefore becomes a prerequisite in toady's interior design. In order to match many kinds of window curtains, the window curtain prop stand provided for hanging window curtain over the window is relatively important as well. As disclosed by a new-typed patent with a title of “Hooker Structure of Adjustable Window Curtain Rod” in ROC Patent No. M289315, an adjusting structure is provided for adjusting the height position of a window curtain rod through an upping and lowering manner, making an appropriate length of the window curtain hanged over the window. However, the hooker structure disclosed by aforementioned patent is too complicated. When the height is needed to be adjusted, bolts have to be rotated by hand, causing more difficulties in the operation of changing window curtain, especially for a housewife when she is doing it by herself at home.

Accordingly, after a substantially devoted study, in cooperation with the application of relative academic principles, the inventor has finally proposed the present invention that is designed reasonably to possess the capability to improve the drawbacks of the prior art significantly.

SUMMARY OF THE INVENTION

The invention is mainly to provide an adjusting structure of adjustable window curtain prop stand, in which a lead screw is designed, so that adjusting the height position of window curtain may be achieved via only rotating the lead screw. The structure is simple and easily operated. Not only the production cost can be lowered down, but also easy operation is welcomed by the public.

Secondly, the invention is to provide an adjusting structure of adjustable window curtain prop stand, including a lead screw, two displacing elements, two positioning elements and a plurality of connecting elements. According to the present invention, the lead screw has two external threads respectively with different directions of spiral and available for being engaged with the two displacing elements thereon. The two positioning elements are respectively located at upper and lower positions between the two displacing elements, where each connecting element is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair. Thereby, an adjusting structure of adjustable window curtain prop stand according to the present invention is thus obtained.

Thirdly, the invention is to provide an adjusting structure of adjustable window curtain prop stand, including a lead screw, two displacing elements, two positioning elements and a plurality of connecting elements. According to the present invention, one side of the lead screw has an external thread available for being engaged with a displacing element thereon, while another displacing element is pivoted by fitting to another side of the lead screw. The two positioning elements are respectively located at upper and lower positions between the two displacing elements, where each connecting element is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair. Thereby, an adjusting structure of adjustable window curtain prop stand according to the present invention is thus obtained.

BRIEF DESCRIPTION OF DRAWING

The features of the invention believed to be novel are set forth with particularity in the appended claims. The invention itself, however, may be best understood by reference to the following detailed description of the invention, which describes a number of embodiments of the invention, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a plane illustration of the window curtain prop stand according to the first embodiment of the present invention;

FIG. 2 is a perspective illustration of the adjusting structure according to the first embodiment of the present invention;

FIG. 3 is a cross-sectional illustration of the adjusting structure according to the first embodiment of the present invention;

FIG. 4 is an acting illustration of the adjusting structure according to the first embodiment of the present invention, when elevating a window curtain;

FIG. 5 is an acting illustration of the adjusting structure according to the first embodiment of the present invention, when lowering down a window curtain;

FIG. 6 is an acting illustration of the adjusting structure according to the second embodiment of the present invention, when elevating a window curtain;

FIG. 7 is an acting illustration of the adjusting structure according to the second embodiment of the present invention, when lowering down a window curtain;

FIG. 8 is a perspective illustration of the adjusting structure according to the third embodiment of the present invention;

FIG. 9 is an acting illustration of the adjusting structure according to the fourth embodiment of the present invention, when elevating a window curtain; and

FIG. 10 is an acting illustration of the adjusting structure according to the fourth embodiment of the present invention, when lowering down a window curtain.

DETAILED DESCRIPTION OF THE INVENTION

In cooperation with attached drawings, the technical contents and detailed description of the present invention are described thereinafter according to a number of preferable embodiments, not used to limit its executing scope. Any equivalent variation and modification made according to appended claims is all covered by the claims claimed by the present invention.

Please refer to FIG. 1 and FIG. 2, respectively showing a plane illustration of the window curtain prop stand and a perspective illustration of the adjusting structure according to the first embodiment of the present invention. The invention is to provide an adjusting structure of adjustable window curtain prop stand. The adjusting structure 3 is plural and horizontally arranged between two prop plates 322, 332 interspaced vertically. By means of the two prop plates 322, 332, a curtain 1 is hanged down from a fixed object, like a ceiling 2. In cooperation with the disposition of the window curtain 1, the adjusting structure 3 is provided for adjusting the height position of the window curtain 1.

Please refer to FIG. 2 together with FIG. 3. The adjusting structure 3 includes a lead screw 30 with two threads in opposite directions of spiral; two displacing elements 31 respectively engaged with the lead screw 30; two positioning elements 32, 33 respectively supported between upper and lower sides of the two displacing elements 31, making the lead screw 30 shown as a horizontally hanged configuration; a plurality of connecting elements 320, 321, 330, 331 separately and actively connected between the displacing elements 31 and the positioning elements 32, 33.

The lead screw 30 is shown as a rod-typed configuration, on which two external threads 300, 301 in opposite directions of spiral are arranged. In other words, two external threads 300, 301 are a left-handed thread and a right-handed thread respectively and shown as a symmetrical disposition on the lead screw 30. In addition, a rotating knob 302 is respectively arranged at two sides of the lead screw 30, any one of which can be rotated by human hand to facilitate the rotation of the lead screw 30.

Two displacing elements 31 are respectively engaged upon two external threads 300, 301 of the lead screw 30. Since the directions of spiral of two external threads of the lead screw 30 are opposite to each other, when the lead screw 30 is rotated in clockwise or counterclockwise directions, the displacing directions of two displacing elements are just opposite to each other as well, such that a displacing effect of moving closely or faraway is thus generated.

Two positioning elements 32, 33 are respectively arranged by securing to two inner side faces of the two prop plates 322, 332. In other words, the two positioning elements 32, 33 are just respectively located at upper and lower positions of the two displacing elements 31 and respectively make an acting connection with the two displacing elements 31 via the four connecting elements 320, 321, 330, 331, where a four links mechanism is formed by taking the two displacing elements 31 as a gliding pair to further make the adjusting structure 3 able to be arranged between two prop plates 322, 332, thereby a window curtain prop stand being thus constituted. Each connecting elements 320, 321, 330, 331 is a thin rod separately.

Accordingly, in an embodiment proposed by the present invention, the lower side of the prop plate 322 is provided for hanging down the window curtain 1, while the other prop plate 332 is secured to the ceiling 2. The positioning element 32 is located below the two displacing element 31 and is actively connected to the two displacing elements 31 via the two connecting elements 320, 321. Since the lengths of the two connecting elements 320, 321 are equal, a relationship of symmetrically equal distance is thus formed. On the other hand, the positioning element 33 is located above the two displacing elements 31 and is actively connected to the two displacing elements 31 via another two connecting elements 330, 331. And, since the lengths of the two connecting elements 330, 331 are equal, a relationship of symmetrically equal distance is thus formed. In this case, the two positioning elements 32, 33 can be respectively secured to the two prop plates 322, 332, making the lead screw 30 shown as a horizontal state and hanged between the two prop plates 322, 332. When the relative displacement of two displacing elements 31 is created by rotating the lead screw 30, the inclining angles of each connecting elements 320, 321, 330, 331 are changed, thereby the distance between the two prop plates 322, 332 being changed as well.

Accordingly, through the constitution of aforementioned assemblies, an adjusting structure of adjustable window curtain prop stand according to the invention is thus obtained.

Therefore, as shown in FIG. 4, when the lead screw 30 is rotated in one direction (for example, clockwise direction), the external thread 300 shown as a left-handed thread will move the displacing element 31 engaged thereon toward the right side of the lead screw 30, while the external thread 301 shown as a right-handed thread will move the displacing element 31 engaged thereon toward the left side of the lead screw 30. In doing so, the two displacing elements 31 will be moved faraway from each other. In other words, the distance between the two prop plates 322, 332 is shrunk. Since the prop plate 332 is secured to the ceiling 2, only the prop plate 322 pushing up each connecting elements 320, 321, 330, 331 is moved upwardly following the movement of the two displacing elements 31. In the meantime, the height position of the window curtain 1 is raised subsequently.

Furthermore, as shown in FIG. 5, when the lead screw 30 is rotated in another direction (for example, counterclockwise direction), the external thread 300 shown as a left-handed thread will move the displacing element 31 engaged thereon toward the left side of the lead screw 30, while the external thread 301 shown as a right-handed thread will move the displacing element 31 engaged thereon toward the right side of the lead screw 30. In doing so, the two displacing elements 31 will be moved closer to each other. In other words, the distance between the two prop plates 322, 332 is enlarged, so the prop plate 322 pulling down each connecting elements 320, 321, 330, 331 is moved downwardly following the movement of the two displacing elements 31. In the meantime, the height position of the window curtain 1 is lowered down subsequently.

In addition, as shown in FIG. 6 and FIG. 7, in a second embodiment according to the present invention, only one side of the lead screw 30 has the external thread 301 provided for the corresponding displacing element 31 to be engaged thereon, while another side of the lead screw 30 is provided for another displacing element 31 arranged thereon. In this case, when the lead screw 30 is rotated in both directions, the height position of the window curtain 1 will be elevated or lowered down.

Furthermore, as shown in FIG. 8, a third embodiment according to the present invention discloses differently varying patterns of each part of the adjusting structure 3. The main difference from the aforementioned embodiment is that the configurations of each connecting elements 320, 321, 330, 331 are changed into a flat shape, such that the bearing strength of each connecting elements 320, 321, 330, 331 is thereby enhanced.

Finally, as shown in FIG. 9 and FIG. 10, in a fourth embodiment according to the present invention, each connecting elements 320, 321, 330, 331 constituted by a striped flat plate can also be applied to the lead screw 30 that only has a single side with external thread 301. However, the same purpose of elevating or lowering down the height position of the window curtain 1 still can be achieved as well.

Summarizing aforementioned description, the adjusting structure according to the invention is an indispensably design for an adjustable window curtain prop stand indeed, which may positively reach the expected usage objective for solving the drawbacks of the prior arts, and which extremely possesses the innovation and progressiveness to completely fulfill the applying merits of new type patent, according to which the invention is thereby applied. Please examine the application carefully and grant it as a formal patent for protecting the rights of the inventor.

However, the aforementioned description is only a preferable embodiment according to the present invention, not used to limit the patent scope of the invention, so equivalently structural variation made to the contents of the present invention, for example, description and drawings, is all covered by the claims claimed thereinafter. 

1. An adjustable window curtain prop stand, including: two prop plates, which are arranged by interspacing to each other and respectively in an upper and a lower positions; and an adjusting structure, which is disposed between the two prop plates, and further includes: a lead screw, one side of which has an external thread; two displacing elements, one of which is arranged by engaging onto the side of the lead screw having the external thread, and another of which is pivoted by fitting onto another side of the lead screw; two positioning elements, which are respectively secured to two inner side faces corresponding to the two prop plates, and which are respectively located at an upper and a lower positions of the two displacing elements; and a plurality of connecting elements, each of which is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair.
 2. The adjustable window curtain prop stand according to claim 1, wherein another side of the lead screw is arranged a rotating knob facilitating in being rotated by a human hand.
 3. The adjustable window curtain prop stand according to claim 1, wherein the connecting elements have an equal length, making a symmetrically equal relationship formed for the linkage mechanism.
 4. The adjustable window curtain prop stand according to claim 3, wherein a quantity of the connecting elements is four.
 5. The adjustable window curtain prop stand according to claim 1, wherein each of the connecting elements is configured as a thin rod.
 6. The adjustable window curtain prop stand according to claim 1, wherein each of the connecting elements is configured as a stripe of flat plate.
 7. An adjusting structure of adjustable window curtain prop stand, including: a lead screw, one side of which has an external thread; two displacing elements, one of which is arranged by engaging onto the side of the lead screw having the external thread, and another of which is pivoted by fitting onto another side of the lead screw; two positioning elements, which are respectively located at an upper and a lower positions of the two displacing elements; and a plurality of connecting elements, each of which is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair.
 8. The adjustable structure of adjustable window curtain prop stand according to claim 7, wherein another side of the lead screw is arranged a rotating knob facilitating in being rotated by a human hand.
 9. The adjustable structure of adjustable window curtain prop stand according to claim 7, wherein the connecting elements have an equal length, making a symmetrically equal relationship formed for the linkage mechanism.
 10. The adjustable structure of adjustable window curtain prop stand according to claim 9, wherein a quantity of the connecting elements is four.
 11. The adjustable structure of adjustable window curtain prop stand according to claim 7, wherein each of the connecting elements is configured as a thin rod.
 12. The adjustable structure of adjustable window curtain prop stand according to claim 7, wherein each of the connecting elements is configured as a stripe of flat plate.
 13. An adjusting structure of adjustable window curtain prop stand, including: a lead screw, which has two external threads with two opposite directions of spiral; two displacing elements, which are respectively arranged by engaging onto the two external threads of the lead screw; two positioning elements, which are respectively located at an upper and a lower positions of the two displacing elements; and a plurality of connecting elements, each of which is separately and actively connected between the two displacing elements and the two displacing elements, such that a linkage mechanism is formed by taking the two displacing elements as a gliding pair.
 14. The adjustable structure of adjustable window curtain prop stand according to claim 13, wherein two sides of the lead screw are respectively arranged a rotating knob facilitating in being rotated by a human hand.
 15. The adjustable structure of adjustable window curtain prop stand according to claim 13, wherein the two external threads of the lead screw are respectively a left-handed thread and a right-handed thread, both of which are disposed symmetrically on the lead screw.
 16. The adjustable structure of adjustable window curtain prop stand according to claim 13, wherein the connecting elements have an equal length, making a symmetrically equal relationship formed for the linkage mechanism.
 17. The adjustable structure of adjustable window curtain prop stand according to claim 16, wherein a quantity of the connecting elements is four.
 18. The adjustable structure of adjustable window curtain prop stand according to claim 13, wherein each of the connecting elements is configured as a thin rod.
 19. The adjustable structure of adjustable window curtain prop stand according to claim 13, wherein each of the connecting elements is configured as a stripe of flat plate. 